Book Maths Puzzle Algebra

I am working with subtitution method for systems of equations...my problem...
x + 3y=6
y=-1/3x + 2

Read Solution (Total 0)

Book Other Question

(Caculate y for which 5y2 +13y -6 > or = 0 A rectangular swimming pool, 30 ft. long and 15 ft. wide, is enclosed by a wooden deck that is 3 ft. wide.
What is the area of the deck?
How much fence is needed to enclose th